#define _CRT_SECURE_NO_WARNINGS  1

/**
 * Definition for a binary tree node.
 * struct TreeNode {
 *     int val;
 *     struct TreeNode *left;
 *     struct TreeNode *right;
 * };
 */


bool isSameTree(struct TreeNode* p, struct TreeNode* q)
{
    if (p == NULL && q == NULL)
        return true;

    if (p == NULL || q == NULL)
        return false;

    if (q->val != p->val)
        return false;

    return isSameTree(p->left, q->left) &&
        isSameTree(p->right, q->right);
}